A Highly Adaptive and Energy-Efficient Optical Interconnect for On-Board Server Communications

Dargie, Waltenegus; Schoeniger, David; Szilágyi, László; An, Xin; Henker, Ronny; Ellinger, Frank

doi:10.1109/icccn.2017.8038420

Cited by 3 publications

(2 citation statements)

References 20 publications

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“…The compound annual growth rate of electricity consumption in data centers is already double the global projection rate, imposing an environmental concern [2]. Data center interconnects, consuming approximately 10% of the overall server power, will face inevitable challenges in power handling capacity due to the big data paradigm shift [3]. To overcome the economic and environmental challenges in power handling capacity of on-chip and chip-to-chip communication, optical interconnects are a viable alternative to the conventional electrical interconnects [4].…”

Section: Introductionmentioning

confidence: 99%

Reconfigurable and Scalable Multimode Silicon Photonics Switch for Energy-Efficient Mode-Division-Multiplexing Systems

Priti

Liboiron-Ladouceur

2019

J. Lightwave Technol.

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A novel integrated scalable multimode switch (SMS) is experimentally demonstrated using tapered multimodeinterference-based couplers and Ti/W metal heater phase shifters for mode-division-multiplexing (MDM) silicon photonics switching. The SMS allows path-reconfigurable switching of the first two (TE0 and TE1) or the first three (TE0, TE1, and TE2) transverse electric (TE) modes using the same device achieving footprint efficiency for higher bandwidth density. A proof-of-concept realization of the two-mode switch demonstrates the (de)multiplexing and switching of broadband optical signals over the TE0 and TE1 modes exhibiting −6.5 dB insertion loss (IL) in the bar state and −7.3 dB IL in the cross state at 1550 nm with less than −14 dB crosstalk. Simultaneous switching of two parallel TE modes (TE0+TE1) exhibits less than −7.0 dB IL and −11.9 dB crosstalk at 1550 nm. An aggregated bandwidth of 2 × 10 Gb/s is experimentally achieved while switching between two non-return-to-zero PRBS31 data signals with <9.8 µs switching time and >17.7 dB switching extinction ratio (ER) for individual-mode transmission, and <7.6 µs switching time and >12.0 dB switching ER for dualmode transmission. The SMS is scalable to switch higher order TE modes with lower energy consumption (up to 63% less) than the single-mode switches indicating its potential application in energyefficient MDM photonic networks.

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Section: Introductionmentioning

confidence: 99%

Reconfigurable and Scalable Multimode Silicon Photonics Switch for Energy-Efficient Mode-Division-Multiplexing Systems

Priti

Liboiron-Ladouceur

2019

J. Lightwave Technol.

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“…Bandwidth density and energy consumption are two key concerns in modern data centers, where hundreds of thousands of massively parallel computers are interconnected to facilitate high speed parallel data movement [1]. Optical interconnect using complementary metal oxide (CMOS) compatible silicon photonics is evolving as a promising solution to diminish this communication bottleneck, enabled by low-cost and mature silicon-on-insulator (SOI) fabrication and processing technology [2]. In inter-and intra-chip data communications, wavelength-division-multiplexing (WDM) requires multiple lasers and optical filters for each communicating channel imposing cost and complexity.…”

Section: Introductionmentioning

confidence: 99%

A Reconfigurable Multimode Demultiplexer/Switch for Mode-Multiplexed Silicon Photonics Interconnects

Priti

Liboiron-Ladouceur

2018

IEEE J. Select. Topics Quantum Electron.

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We experimentally demonstrate a scalable and broadband reconfigurable multimode demultiplexer/switch (RMDS) for mode-division multiplexed inter-and intra-chip data communication systems. The RMDS exploits a thermo-optically tuned tapered multimode interference coupler, enabling simultaneous transmission of the fundamental and first order quasi transverse electric modes in C-band. It is used as the building block in a mode demultiplexer with −20 dB crosstalk, which can be reconfigured as a mode selecting switch with 10.9 µs switching time. An aggregated bandwidth of 2 × 10 Gb/s is achieved by the parallel transmission of two nonreturn-to-Zero (NRZ) PRBS31 data signals at 10 −12 biterror-rate with 2.8 dB BER power penalty. A 1.55 pJ/bit energy efficiency is estimated for a proposed multimode optical link.

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3×10 Gb/s silicon three-mode switch with 120° hybrid based unbalanced Mach-Zehnder interferometer

Priti¹,

Zhang²,

Liboiron-Ladouceur³

2019

Opt. Express

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A Highly Adaptive and Energy-Efficient Optical Interconnect for On-Board Server Communications

Cited by 3 publications

References 20 publications

Reconfigurable and Scalable Multimode Silicon Photonics Switch for Energy-Efficient Mode-Division-Multiplexing Systems

Reconfigurable and Scalable Multimode Silicon Photonics Switch for Energy-Efficient Mode-Division-Multiplexing Systems

A Reconfigurable Multimode Demultiplexer/Switch for Mode-Multiplexed Silicon Photonics Interconnects

3×10 Gb/s silicon three-mode switch with 120° hybrid based unbalanced Mach-Zehnder interferometer

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